Power-transmission gearing



Dec. l0, 1929. R. L.

D'ENNISON 1,738,695

POWER TRANSMISSION GE'ARING Original Fi led Jan. 20, 192'? 2 Sheets-Sheet 1 Zilllllll-mlllllllilli" j /Y f 15 22,-, i'foaf/frLDf/wwao/v atten/m14 10, 1929. R. L. DENNlsoN POWER TRANSMISSION GEARING original' Filed Jn. 2o, 1927 2 Sheets-Sheet 2 Patented Dec. l0, 1929 ROBERT L. DENNISON, F KANSAS CTY, MSSOURI rowna-'m'nrinsivirssron GEARING Application filed January 20, 1927, ySerial No.,162,353. 'Renewed October 29, 1929.

This invention relates to power transmission gearing. l I f An important object of the invent-ion is to provide novel gearing for the angular transmission of power wherein the turning force .Y transmitted to the gears and thus to eliminate uneven wearing of the bearings and more eificiently to transmit power.

A further object is to provide a drive shaft and a driven shaft arranged at an angle to 2o each other and provided with bevel pinions, and a pair of powertransmitting bevel gears meshing with said pinions on opposite sides thereofto equalize the transmission of power.

A further object is to provide novel supporting means for the power transmitting bevel gears whereby the latter are adapted 1 to slightly alter their positions according to the forces delivered to the gears whereby such forces are wholly equalized. l

Other objects and advantages of the invention will become apparent during the course Y of the following description.

- ln the drawings I have shown one embodiment of the invention. In this showing,

Figure 1 is a side elevation, parts being broken away,

Figure 2 is a central vertical sectional view, parts being shown in elevation,

Figure 3 is a horizontal section .on line 3-3 of Figure 1, f

Figure 4 is a detail perspective of a portion of the driven shaft and associated elements,

and,

Figure 5 is a. detail section on line 5 5 of V 45 Figure 2.'

bolts `14 passing through the Vflanges and heads. The casingis provided at one side with an opening 15, as shown in Figure 3, and a bearing 16 is secured against this opening by bolts or the like 17. A bushin 18 is 5.5

arranged in the bearing 16 and rotata ly receives a drive shaft 19having a bevelpinion 2O arranged on its inner end. A thrust bearing 21 surrounds the shaft 19 between the pinion 20 and bearing 16. The shaft 19 con'- 60 stitutes the drive shaft and is connected with any suitable source ofV power, as willbe obvious.

A driven shaft 22 is arranged axially' within the casing 10 and is j ournalled in the lower 65 f head 13, as shown in Figure 2. rlhe driven shaft is provided adjacent the heads 12V and l 13 with bearing disks 23 for a purpose to be described. A driven pinion 24 is secured to the shaft 22.y and a suitable thrustbearing 25 70 Vis arranged between the pinion 24 and lower 'disk 23.

A frame indicated as a whole by the numeral 26 is arranged within the casing 10. The frame 26 comprises upper and lower sections 75 27 secured together by bolts .28 passing through flanges 29a formed on the` adjacent ends of the sections. The adjacent faces of the sections 27 are provided with complementary semi-cylindrical out out portions 28a 80 to receive a transverse shaft 2 9, and this shaft is secured to the frame 26 by bolts 30 passing through the ends of the shaft 'and the adjacent portions of the frame.` The'shaft 29 is provided centrally thereof with a preferably integral bearing 31 in which the shaft 22 is rotatably mounted. The frame sections 2 7 are provided with longitudinally extending slots 32, andthe ends of the frame sections are circular as indicated at 33 (see Figure 5). The 90 circular' portions 33 act as bearings to receive the disks 23. j

A pair of oppositely arranged bevel gears 34 are mounted freely on the shaft 29, and are provided with hubs 35 surrounding this shaft. 95 The casing sections are recessed as at 36 to receive thrust bearings: 37 to minimize friction due to end thrust-s against the gears 34.

rlhe operation of the device is as follows:

The device is adapted to be employed in power is applied to the shaft 19 to drive the Vpinion 20, and rotation of this pinion obviously will drive the gears 34 in opposite directions. Rotation of the gears 34 is, Yin turn, transmitted to the pinion 24 to rotate the shaft 22, the power of this shaft being utilized in any desired manner, such as for driving deep well pumps. As iswell known, the transmission of power between bevel gears causes considerable lateral thrust on the shafts andV bearings thus causing the latter to-unevenly kwear and greatly increasing the friction.

The operation of such a device also results in the rapid wearing of thegear teeth.' 4With y20 the present construction, power is delivered p Vfrom opposite'sides of the pinion 20 thus tending to equalize the delivery of power and to minimize side thrusts on'the shaft 19 and bushing 18. In a similar manner, power is l2.5V delivered vsubstantially equally to opposite sides kof the pinion 24, thus eliminating side thrusts on the shaft 22. The delivery of power equally from opposite sides of the gears is not. only equalized, but the wearing of the m30, gear teeth is `greatly retarded. With the structure thus described, however, it has-been vfound vthat perfect equalization of strains is Y not obtained, although this structure in itself gearing constructions provided for the same purpose. In order to effect perfect equalization in the delivery of power, the frame 26 is provided This frame is supported in position by the heads 12 and 13 and is adapted to partake [of limited rotary movement about the axis of the driven shaft 22, the disks 23 acting as bearings for the frame. With the vprovision of this construction, it has been lfound that if a slight excess in power is delivered to vone ofthe gears 34, or from one of these gears yto the pinion 24, the frame 26 is adapted to slightly alter its position about the axis of theV shaft 22, thus perfectly effecting 'the equalization in the delivery .of power. When the apparatus is accurately construct- Ved, it'will be understood that the movement of the frame 27 about the axis of the shaft 22 Vis extremelyv slight but in actual practice has been found to perfectly equalize the delivery of power and the apparatus is adapted to be operated over long periods of time with' very slight wear to the gear teeth'and without the 4the transmission of lateral thrusts to any of the bearings. In view of the inherent characteristics of the device as just described, it is particularly adapted for the transmission of relatively high rotative speeds.

, It is to be understood that the form of the 'Y invention herewith shown and described is to 65 be taken asa preferred example of the same embodies material advantages over the usual andr that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

I claim.: Y

1. Apparatus of the character described comprising a drive shaft and a driven shaft,

pinionsv mounted on said shafts, a plurality with each 'of said pinionsfon opposite sides Y thereof, and means forenabling said bevel gears toV alter their.l positions about the axis of one of said shafts. Y

Y 3. Apparatus of the `character .described comprising a drive shaft and a driven shaft arranged at an angle to each other, abevel pinion mounted on each of said shafts, a pair vof oppositelyarranged bevel gears freely rotatable about their own axes `and meshing with each of saidfpinions on opposite sides thereof, and means for supporting said gearsto permit them to simultaneously alter theirl positions in the same direction about the axis of one of said shafts.

4. Apparatus of the character described comprising a drive shaftand a driven shaft arranged at an anglerto each other, a bevel Y pinion mounted on each of said shafts,a pair of oppositely arranged bevel gears'lfreely rotatable about their own'axes and meshing with 'each of said pinions on opposite sidesy thereof, and a frame supporting said gears to permit them to simultaneously alter their positions in the saine direction about the axis of one of said shafts. v

5. Apparatus. of the character 'described comprising a drive shaft .and a driven shaft arranged at an angle to each other, a bevel pinion mounted on each of said shafts, a pair of oppositely arranged bevel gears freely rotatable about their own axes and meshing with each of said pinions on opposite sides thereof, a member for supporting said gears, and means for rotatably supporting said member to permit said gears toV simultaneously alter their positions in the same direction about the axis of one of said shafts.

6. Apparatus of the character described comprising a drive shaft and a driven shaft arranged at an angle to each other', a bevel pinion mounted on each of said shafts, a pair of oppositely arranged bevel gears freely rotatable. about their own axes and meshing with each of saidy pinions on vopposite sides thereof, a fixed shaft about which said bevel gears are rotatable, a framesupporting said fixed shaft, and means for enabling said frame to alter its position about the axis of one of said first named shafts.

7. Apparatus constructed in accordance With claim 6 wherein said means comprises a. casing, and bearings for said first named shafts carried by said casing.

8. Apparatus of the character described comprising a substantially.cylindrical casing, a pair of bearings carried by sald casing substantially at right angles to each other,

one of said bearings being arranged axially with respect to sai-d casing, drive and driven l shafts j ournaled in said bearings, a bevel pinion mounted on each of said shafts Within said casing, oppositely arranged bevel gears meshing with each of vsaid pinions on opposite sides thereof, and means arranged in said casing and supporting said bevel gears to permit the latter to simultaneously alter their position in one direction about the axis of one of said shafts.

9. Apparatus of the character described comprising a substantially cylindrical casing; a pair of bearings carried by said cas-l ing substantially at right angles toeach other, one of said bearings being arranged axially with respect to said casing, drive and driven shafts journaled in said bearings, a

bevel pinion mounted on each of said shafts Within said casing, oppositely arranged bevel gears meshing With each of said pinions on opposite sides thereof, a fixed shaft supporting sai-d bevel gears to permit free rotation thereof With respect to each other, and a frame carrying said fixed shaft and rotatably Y supported in said casing coaxially With on of said first named shafts.

In testimony whereof I affix my signature.

ROBERT L. DENNISON. 

